Reliance Digital - Billing and forcing to Pay before demonstration as the product ultimately happens to be a Malfunctio

Hi. I was looking for a Canon Pixima E*** printer, in the Reliance Digital Kharagpur branch & they had the model but all were malfunctioning pieces. Moreover they billed me first and the system forced me to pay first and then they opened it for demo. So while showing demo they struggled technically and the only thing they were doing was to open and close the cartridge section, which didn't help the cause at all. I even tried to co-operate with them as they asked me to keep my newly paid product for ** hours in their showroom for customer care support which I agreed but in vain, ultimately they didn't have any replacement piece and agreed for a different kind of repayment. So the whole scenario stands like this, I paid for a malfunctioning printer of Reliance Digital(without even knowing it was a malfunctioning piece before payment), and they will get a replacement piece from Canon on my money, as I was the one for whom they opened the new piece and how funny is that I am not even able to receive it, as I am in requirement of it in urgent, and had to agree for the cancellation.To add to this, I have to wait for * days for the repayment. Great Experience...really?
Suggestions:
*) Please keep some technical support at every unit, because salesmens are salesmen not technical support staffs.

*) Loyalty can't be teached but try having loyal and commited persons in stores. They simply have the no bother attitude. If any customer is moving with unsatisfied service or not getting what they are looking for, these people don't care. Yes who is suffering ultimately? The brand.

*)Last but not the least, Material in working condition should be first shown in demonstration and then should one be proceeded for payment. Why should the customer pay for your malfunctioning item, and specially when there is no other extra piece in the stores for replacement.